Bolts - the stick thingy, in crossbows and arbalests. For knives, the simplest and most effective route is flint knapping. Skipping the whole metallurgy chain let's you get to skinning and carving faster, and flint knives are sharper than metal knives anyways.
Intelligence wise, for me it's a curse. I'm not claiming to be a great wizard or anything, but I've got enough to know when I'm being excluded out of envy, and have to tactically pretend to be dumb so that people don't ostracize me right away. This "lived experience," to borrow a commie term ironically, is how I know that humanity is getting dumber over time - civilization commits a slow genocide against intelligence by ostracizing intelligent people and thus denying them the opportunities that would allow them to reproduce.
Social-natural selection selects for workers that don't think. Its shockingly evident in the chikdren of immigrants that come up from the south here - after generations in this environment, their modern descendants are, at best, programmed into belligerent social justice warriors, making all conversations with them a dangerous waste of time. And what story does their ancestry tell? Subjugation only, first as unquestioning catholics, and then as the survivors of encomienda. Compare with the population of North America - we mixed with natives, learned from them, and did not enslave them and exterminate them, which was the 500 years process in the Latin countries. The European settlers were largely from nobility - second sons with no inheritance other than their wits, which were substantial, and that's why they were nobility, mixed with undomesticated native Americans, and notably excluded catholics, who were and are so domesticated that they fail to question the obviously lying and corrupt clergy. The result was a warrior poet north vs a subservient horde of unthinking workers in the south. I doubt a sharper divide can be found anywhere on earth.
Anyways. None of this is intended to say that any human beings are less valuable than others. A being is a being, regardless of details.